How to put a tag on branch using rtag?

[Maxio]

Hi,

How can I put a tag on most current sources in specific branch using rtag?
For main trunk I simply use rtag "tagname", but how to do it for a
specific branch?
I know I can do it locally using tag, bug I try to avoid using 'tag'
command because it is not stored in history.
The only solution I see now it to create local tag and then use
rtag -r 'local_tag" desired_tag,
but it forces me to checkout all files I want to tag.

Regards,
Max